- Also known as:
- Aju-Tasch
- Related Topics:
- human evolution
- archaeology
- fossil
- Denisovan
- Acheulean industry
- Related Places:
- Russia
Denisova Cave
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What is Denisova Cave?
Denisova Cave, or Aju-Tasch, is located in the Anui River valley in the Altai Mountains of Russia. Paleoanthropological excavations at the site have revealed more than 20 layers of artifacts, indicating hominin occupation from 280,000 years ago to the Middle Ages.
The cave is named for the Denisovans, a previously unknown group of hominins who were neither modern humans nor Neanderthals. The Denisovans inhabited the cave along with early modern humans and possibly Neanderthals at different times. Genetic analysis has revealed that Denisovans interbred with early modern humans and that 4 to 6 percent of the Denisovan genome also occurs in the genomes of modern humans from Melanesia.
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Where is Denisova Cave located?
Denisova Cave (also known as Aju-Tasch, meaning "bear rock" in Altay) is located in the Anui River valley, approximately 60 miles (100 km) south of Biysk, in the Altai Mountains of Siberia, Russia. Paleoanthropological excavations at the site have uncovered more than 20 layers of artifacts, which indicate the cave was occupied by hominins from as early as 280,000 years ago to the Middle Ages. Genetic sequencing of specimens found in the cave led to the discovery of a previously unknown group of hominins called Denisovans.
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Why is Denisova Cave important for scientists?
Denisova Cave is an important site because it shows the presence of hominins as far back as 280,000 years ago. Occupied by early modern humans and possibly Neanderthals at different times, the cave is most notable for the discovery of a previously unknown group of hominins called Denisovans. DNA sequencing of a finger bone found in the cave revealed that the Denisovan lineage branched off from a common ancestor well before the Neanderthal and modern human lineages. Genetic analysis suggests that Denisovans lived throughout Eurasia and interbred with early modern humans.
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What ancient human groups have been found in Denisova Cave?
Denisova Cave in Russia has been a significant site for understanding ancient human history. Archaeological findings indicate that the cave was inhabited by early modern humans (Homo sapiens) and possibly Neanderthals (H. neanderthalensis) at different times.
Additionally, the cave is known for the discovery of a previously unknown group of hominins called the Denisovans, who were distinct from both modern humans and Neanderthals. Genetic analysis suggests that the Denisovans may have interbred with early modern humans.
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What kinds of artifacts and fossils have scientists discovered there?
Denisova Cave in Russia's Altai Mountains is a significant site for paleoanthropological excavations, with over 20 layers of artifacts indicating hominin occupation from 280,000 years ago to the Middle Ages.
Artifacts from the Acheulean, Mousterian, and Levalloisian stone-flaking industries suggest 13 separate occupations between 125,000 and 30,000 years ago. Researchers found evidence of early modern humans (Homo sapiens) and possibly Neanderthals (H. neanderthalensis).
Notably, the cave also contained evidence of a previously unknown group of hominins, the Denisovans. A finger bone specimen, dated to 30,000 to 48,000 years ago, showed significant differences in mitochondrial DNA compared to modern humans and Neanderthals, suggesting the Denisovan lineage branched off from a common ancestor much earlier. A tooth excavated in 2000 also displayed structural features not found in Neanderthals or modern humans.
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How have DNA studies from Denisova Cave changed our understanding of human evolution?
DNA studies from Denisova Cave have significantly altered the understanding of human evolution by revealing the existence of a previously unknown group of hominins called Denisovans. These studies, which include sequencing of mitochondrial and nuclear DNA from fossils found in the cave, indicate that Denisovans coexisted with Neanderthals and early modern humans in the Altai region around 40,000 years ago.
Genetic analysis has further shown that Denisovans interbred with early modern humans, with 4 to 6 percent of the Denisovan genome present in modern humans from Melanesia. This suggests that Denisovans were widespread throughout Eurasia and capable of seafaring. The discovery of Denisovan DNA in the Harbin cranium, a 146,000-year-old skull, adds to the evidence of their existence.
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Denisova Cave, site of paleoanthropological excavations in the Anui River valley roughly 60 miles (100 km) south of Biysk in the Altai Mountains of Russia. The cave contains more than 20 layers of excavated artifacts, indicating occupation by hominins as long ago as 280,000 years before the present to as recently as the Middle Ages. Evidence of 13 separate occupations occurring between 125,000 and 30,000 years ago is supported by the presence of artifacts from the Acheulean, Mousterian, and Levalloisian stone-flaking industries. Researchers maintain that the cave was inhabited by early modern humans (Homo sapiens) and possibly Neanderthals (H. neanderthalensis) at different times. In addition, they have discovered evidence of occupation by a previously unknown group of hominins, dubbed the Denisovans, who were neither modern humans nor Neanderthals; for his pioneering work on these species, Swedish evolutionary geneticist Svante Pääbo received the 2022 Nobel Prize for Physiology or Medicine. The cave is known locally as Aju-Tasch, which means “bear rock” in Altay.
In 2010 a group of European and American scientists reported the sequencing of the complete mitochondrial DNA (mtDNA) genome obtained from a specimen found in the Denisova Cave in 2008. (Mitochondrial DNA is taken from the mitochondria rather than from the nuclei of extracted cells; it is frequently used to date biological specimens and calculate their genetic proximity to other specimens.) The specimen, a finger bone from what was believed to be a small child, was dated to between 30,000 and 48,000 years ago. Despite the specimen’s having been found in association with artifacts of the Mousterian Industry (that is, the tool-making culture traditionally associated with Neanderthals), its mtDNA showed nearly twice as many differences from modern human mtDNA than are shown in Neanderthal mtDNA. These findings indicated that the Denisovan lineage branched off from some common ancestor well before the lineage that includes Neanderthals and modern humans. The most recent common mtDNA that could have been shared by these two lineages would have occurred roughly one million years ago. Consequently, the researchers have suggested that Neanderthals, H. sapiens, and a third group of genetically distinct hominins (the Denisovans) inhabited the Altai region at the same time some 40,000 years ago.
In another study published the same year, genetic material extracted from the nuclei of cells taken from the same finger bone was used to sequence the Denisovan nuclear genome. Genetic analysis, which also included the examination of mtDNA, determined that the finger bone as well as a tooth excavated from the cave in 2000 belonged to two different, but genetically similar, individuals and that these individuals had significant genetic differences from Neanderthals and modern humans. (In addition, the tooth possessed structural features that did not occur in those species.) A comparison of the Denisovan nuclear genome with those of Neanderthals and modern humans suggested that possibly 4 to 6 percent of the material in the Denisovan genome also occurred in the genomes of modern humans from Melanesia. Such findings implied that the Denisovans appeared throughout large parts of Eurasia and that they interbred with early modern humans.
